[Tutor] Noob question

[Amit Saxena]

Hi Eric,

Thanks for the information..............since i m new to Python so didnt
knew about this fact...........thanks again for it, will keep it in mind
while writing such a program.

Amit

On Dec 10, 2007 8:57 PM, Eric Brunson <brunson at brunson.com> wrote:

>
> Hi Amit,
>
> This is fairly inefficient.  Because strings in python are immutable
> this approach causes a new string to be created every iteration.  While
> it may not be an issue with just 3 strings, it is much better to create
> your list and use "".join() to create the concatenation after the list
> is complete.  When you get used to it, it's a bit more concise and
> readable, also.
>
> Sincerely,
> e.
>
> Amit Saxena wrote:
> > The simplest way i could think of:
> >
> > a=["apple","orange","banana"]
> > b = ""
> > for i in range(len(a)):
> >      b += a[i]
> > print b
> >
> >
> > Amit
> >
> > On Dec 10, 2007 6:48 AM, Alan Gauld <alan.gauld at btinternet.com
> > <mailto:alan.gauld at btinternet.com>> wrote:
> >
> >     "Eric Walstad" <eric at ericwalstad.com
> >     <mailto:eric at ericwalstad.com>> wrote
> >
> >     > You could also achieve the same result of concatenating a list of
> >     > strings by looping over the list items like so:
> >     >
> >     > b = ''
> >     > for fruit in a:
> >     >    b += fruit
> >     >
> >     > print b
> >
> >     And to add to the options you could use the formatting operator
> >     provided you know there are only 3 items,
> >
> >     b = "%s%s%s" % tuple(a)
> >
> >     Or for an indefinite number of strings:
> >
> >     b = "%s" * len(a)
> >     b = b % tuple(a)
> >
> >     So many options. However, to the OP, if you get stuck in
> >     future its best if you post the erroneous code that you have tried,
> >     then we can better see where you have gone wrong and thus
> >     provide clearer guidance on how to fix it. Its better to learn to
> >     do it your own way correctly than just to see other folks
> >     attempts .
> >
> >     HTH,
> >
> >     --
> >     Alan Gauld
> >     Author of the Learn to Program web site
> >     http://www.freenetpages.co.uk/hp/alan.gauld
> >
> >     _______________________________________________
> >     Tutor maillist  -  Tutor at python.org <mailto:Tutor at python.org>
> >     http://mail.python.org/mailman/listinfo/tutor
> >
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Tutor maillist  -  Tutor at python.org
> > http://mail.python.org/mailman/listinfo/tutor
> >
>
>


-- 
Thanks and Regards,
Amit Saxena
Senior QA Engineer
Ketera
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